package org.viva.secu;

import javax.annotation.Resource;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.viva.entity.secu.Role;
import org.viva.entity.secu.User;
import org.viva.service.secu.UserService;

public class Realm extends AuthorizingRealm {

    @Resource
    private UserService userService;

    /**
     * 授权信息
     */
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        String username = (String) principals.fromRealm(getName()).iterator().next();
        if (username != null) {
            User user = userService.getUserByName(username);
            if (user != null && user.getRoles() != null) {
                SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
                for (Role role : user.getRoles()) {
                    info.addRole(role.getName());
                    info.addStringPermissions(role.getPermissionsAsString());
                }
                return info;
            }
        }
        return null;
    }

    /**
     * 认证信息
     */
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authcToken) throws AuthenticationException {
        UsernamePasswordToken token = (UsernamePasswordToken) authcToken;
        String userName = token.getUsername();
        if (userName == null || "".equals(userName)) throw new UnknownAccountException("没有找到该账号");
        User user = userService.getUserByName(userName);
        if (user == null) throw new UnknownAccountException("没有找到该账号");
        if (!user.getPassword().equals(new String(token.getPassword()))) throw new UnknownAccountException("帐号密码错误");
        Security.login(user);
        return new SimpleAuthenticationInfo(user.getCode(), user.getPassword(), getName());
    }

    public void setUserService(UserService userService) {
        this.userService = userService;
    }
}
